Step for a portable riser assembly



FIG. 1 is a top, front, and left end perspective view of a step for a portable riser assembly showing our new design;

FIG. 2 is a bottom, rear, and right end perspective view;

FIG. 3 is a right end elevational view;

FIG. 4 is a left end elevational view;

FIG. 5 is a rear elevational view;

FIG. 6 is a bottom plan view;

FIG. 7 is a front elevational view; and,

FIG. 8 is a top plan view. 

The ornamental design for a step for a portable riser assembly, as shown. 